HIMail send successfully!<pre>SendGrid\Response Object
(
    [statusCode:protected] => 401
    [body:protected] => {"errors":[{"message":"The provided authorization grant is invalid, expired, or revoked","field":null,"help":null}]}
    [headers:protected] => Array
        (
            [0] => HTTP/1.1 401 Unauthorized
            [1] => Server: nginx
            [2] => Date: Fri, 04 Jul 2025 09:01:12 GMT
            [3] => Content-Type: application/json
            [4] => Content-Length: 116
            [5] => Connection: keep-alive
            [6] => Access-Control-Allow-Origin: https://sendgrid.api-docs.io
            [7] => Access-Control-Allow-Methods: POST
            [8] => Access-Control-Allow-Headers: Authorization, Content-Type, On-behalf-of, x-sg-elas-acl
            [9] => Access-Control-Max-Age: 600
            [10] => X-No-CORS-Reason: https://sendgrid.com/docs/Classroom/Basics/API/cors.html
            [11] => Strict-Transport-Security: max-age=31536000; includeSubDomains
            [12] => Content-Security-Policy: frame-ancestors 'none'
            [13] => Cache-Control: no-cache
            [14] => X-Content-Type-Options: no-sniff
            [15] => Referrer-Policy: strict-origin-when-cross-origin
            [16] => 
            [17] => 
        )

)
</pre>